Hello, I need some advices regarding spindle synchronized motion on LinuxCNC 2.6.3. I rebuilt the machine that drives my CNC knee mill a few days ago and I can't get the tapping sequence to work correctly. The Z axis motion waits above the hole while the spindle accelerates to speed (which I believe is quite correct), it then moves the Z axis to tap the hole. When it gets to the bottom of the hole, however, it seems to hold the Z axis still while the spindle decelerates. It also holds the Z axis still while the spindle accelerates back up to speed (in the reverse direction) before moving the Z axis back up to the top of the hole. I've recorded it on video to demonstrate what I'm trying to say. The video can be seen at http://www.youtube.com/watch?v=8KEfMRF1yx4
I had this working correctly on LinuxCNC 2.5 and I haven't made any changes to the electronics since then. I chose to do a full machine rebuild using the Debian Wheezy ISO image from www.LinuxCNC.org. I used the PNCConf wizard to generate my configuration files and, as far as I can see, they don't look drastically different to those that used to work. The GCode I'm running is "G33.1 K0.7 Z-18". Can anyone suggest somewhere for me to look? I expect there are lots of people doing rigid tapping and so I can only imagine that I've configured something poorly. Rather than publishing my whole configuration, I was hoping that someone might suggest an avenue of investigation. Thanks David Nicholls ------------------------------------------------------------------------------ Slashdot TV. Videos for Nerds. Stuff that Matters. http://pubads.g.doubleclick.net/gampad/clk?id=160591471&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
